Irrigator-sprinkler.



R. MCVULLAN.

IRRIGATOR SPRINKLER.

APPLICATION FILED SEPT. 18, 1913.

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' Patented Apr. 18, 1916.

45 y semicircular or curved shape of the end d of maaier.

Specification of Letters Patent.

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Patented Apr.. lle, 1min.

Application led September 1t, 1913. Serial No. 790,523.

ToV all whom it may concern.'

Be it known that l, RoBERT-McMULLANf a subject of the `King of GreatBritain, and residing at 99 South Terrace, Fremantle, Western Australia,Commonwealth oi" Australia, have invented certain new and usefulImprovements in llrrigator-Sprinklers, of which the following is a'specification.

This invention relates to those sprinklers which rotate owing to theforce of the escaping water and an important result is attained by thisconstruction in that the volume of water issuing from the water exit atany point is such that there is neither overwatering or underwateringof` any .portion of the area comprised within the peripheral workingline, or in' other words,

there is uniform distribution of waterv within the area sprinkled bythel rotatingA sprays. j

The invention essentially resides also in,l the construction and-assemblage of the sprinkler with its pivot and water seal.`

. The construction and operation of Ithe invention will 1now bedescribed with the aidl of the attached drawings in which Figure l is anelevation, partly in section, of 4a sprinkler and nipple made accordingto this invention and lFig. 2 is atop plan' of the nipple proper.

Referringyto said'drawings the nipple a is secured by threads in theelbow b' on the yend of the revolving arm o. The exit end d of thenipple is of a semicircular or a semispherical Aform and across the topof such rounded end d' is :lformed a wedge or l! shaped slot or 4openlngas e (see Fig. 2).

` v Thisgraduated slot. e ofthe form shown is used with its large end ftoward the outer edge of the orbit or circle of the rotating irrigator`o in order to allow the greatest volume of water to be greaterperipheral area served by the irrigator in its rotation. 4 I

The slot e in vertical section follows the the otherwise closed nippleawhile its other or horizontal shape is that of a l! or graduated slot asabove described. The nipple when in its working position isperpendicular to the revolving and horizontalarm c;

These nipples o are removably secured by threads in the elbow b' andnected to the arms c so as to cause the rota tion ot said arms by reasonof the force of .whole appliance rides or rotates so distributed overthe speed of rotation of may be varied, brace rods extending from theupper extremity ofA said mast thereby con- V the exitl water as shown bythey arrows g.

These arms are secured by threads in theV central case or hub j havingthe mast head 7c threaded thereinto as shown while by the rods m saidarmsare stayed or guyed. The central fixed pipe n which acts as thewater feed pipe has the openings nl through which the water escapes intothe hub j and therethroughto the arms c as indicated by the arrows. Thisfixed pipe is formed with the closed top having the pin p upon which thegiving ease of movement and a minimum o friction. By means of the masthead c the tension is effected and when overpressure of water occurs thesprinkler may be braked Vto a reducedspeed. The hub at its bottom isprovided with a packing comprising a screvi7 threaded gland r and awasher s coninedbetween an annular shoulder t on the pipe rtf-and thelower end of the hub. lFurther by the mast head adjustment c the washers'can be made suiciently tight to preventthe escape of water and anyupwardv displacement of the sprinkler when rotating. at ll claim as myinvention and desire to secure byllietters Patent is sponding bearingrecess 1n. its -lower endv adapted toy receive said bearinglpin'ot1 thesupply pipe and being rection of the axis of the hub, whereby the saidhub an'd nozzles and secured to said nozzles adjacent theirV freeends\,"and a water-tight gland between the lower end of thehub andV saidpipe, said gland preventing a slidable movement of the hub with respectto the pipe.

2.,An irrigating sprinklercomprising a hollow hub formlng a waterdistributing chamber, discharge nozzles projecting from said hub, asupply pipe having its upper end projecting into said hub, a supportingHarige the upper end of said,

adjustable in the dilill@ projecting from said supply pipe adjacentadjustable bearing mounted between the hub its upper end, a packinggland adapted to and the upper end of said pipe.

surroundy said pipe below and engage with In testimony whereof I havehereunto set said supporting iange and to be threaded on my hand inpresence of two subscribing 5 the ylower end of the hub, said glandbeing witnesses.

formed with a mortise adapted to receive' said supporting flange, aWasher surround- I' ROBERT MCMULLAN' ing said pipe and interposedbetween said Witnesses: packing gland and the lower end of the hubRICHARD SPARROW,

le and verlyingsaid supporting ange and an' FREDERICK CHARLES WAITHAM.

